uerr

uerr 是一个提供惊人的可视化错误处理的 crate。

展示

使用以下代码，我们可以显示一个简单的错误并将其展示给用户。

use uerr::UserError;

#[test]
fn sample_error() {
    UserError::from("could not open file")
        .and_reason("The system cannot find the file specified.")
        .and_help("Does this file exist?")
        .print_all("uerr/error: ");
}

输出

uerr/error: could not open file
 - caused by: The system cannot find the file specified.
 + help: Does this file exist?

带有多个参数

program.exe: could not open file
 - caused by: The system cannot find the file specified.
     |        Filler reason.
 + help: Does this file exist?
     |   Filler help.

#[test]
fn sample_error() {
    UserError::from("could not open file")
        .and_reason("The system cannot find the file specified.")
        .and_reason("Filler reason.")
        .and_help("Does this file exist?")
        .and_help("Filler help.")
        .print_all("program.exe: ");
}

带有错误退出

UserError 结构体也支持内联退出。

#[test]
fn sample_error() {
    UserError::from("Sample Error")
        .print_all("my program: ")
        .exit(-1);
}